11.1V 6600mAh portable B-mode battery design

I. Requirements for the design of a portable B-mode battery:

    The portable B-mode ultrasound machine is convenient for medical personnel to carry out indoor and outdoor work. Providing continuous, efficient, and stable mobile power has become the greatest guarantee for the normal operation of such equipment. The solution uses high-performance cells, which makes the entire battery have high energy ratio, light weight, small size, high cycle life, high safety, and high consistency. The power management solution uses a highly intelligent SBS battery management system to effectively manage the safety and power of the battery.

Second, the design of portable B-mode battery:

    1) Protection board (PCM): mainly designed for the protection circuit of rechargeable smart battery packs. Due to the chemical characteristics of the lithium battery itself, intelligent power calculation, overcharge, overdischarge, short circuit, overcurrent and overtemperature are required. Protective function. To avoid dangers such as burning and explosion.

    2) AFE / IC (Protection IC): The main protection function chip of the design scheme, which constantly monitors the battery core over-charge, over-discharge, over-current, short-circuit and other functions online. Make the battery work in a safe, stable and efficient range.

    3) 18650 Li-ion cell: 18650 Li-ion cell (BAK).

    4) MOSFET: The MOSFET tube acts as a switch in the protection circuit, so that the voltage across the load will not increase or decrease, ensuring voltage stability.

    5) Power management control chip (BQ2085): a full-featured fuel gauge with an analog-to-digital converter (ADC) that measures voltage and temperature and an analog-to-digital converter that measures current and charge sensing. The fuel gauge has a microprocessor, which is responsible for performing power testing, and can provide information such as the Remaining State of Capacity. The BQ2085 chip also provides the remaining run time to empty. The host can query this information from the fuel gauge at any time to inform the user of the battery information. The fuel gauge is very convenient to use, allowing users to grasp the battery power at any time.

    6) Battery pack package: plastic case.